Hello. No problem at all! Ah yes, I found the same ebay vendor, I think. I will go with them if things like VAT are ok (brexit sucks). I noticed in your other thread that you were planning to make the schematics open-source. Is that the case? Also, could you link me to the programmer’s manual? Thanks.
It's still my plan, but I don't quite have a working schematic yet. I mean, it worked, but there were a few glitches I need to address in the next iteration before I release it.
Send me a DM or an email or something and I can fire you off what I have.
Send me a DM or an email or something and I can fire you off what I have.
Hey. Many thanks. My account is still under moderation, so I cannot DM right now. Although, you should be able to DM me. If that’s what you want. Otherwsie I will DM when possible.
Why DM and PM ?
Why do you not share openly on the forum any information you have in excess of what is already available ? That was the way I did when you asked me for help in your "other" thread below ?
https://www.diyaudio.com/community/threads/lm3886-5-1-build.393554/
For the time being, I have shown my schematics in post #8 of the "other" thread. The schematic has been verified in the thread/post below.
https://www.diyaudio.com/community/...ces-opinions-ideas.381423/page-3#post-7026769
Programming guide attached. Enjoy.
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Hi. Thanks very much for this, and all your published schematics, they will be definitely be useful to me! I don’t mind communicating in this thread.
I received the following question(s) from @duanestorey via PM that I'm answering below.
For example, my DVD player puts out STREAMSEL / DECODESEL = 3/3 every time I pause/stop the playback, but that doesn't mean there's PCM data in the stream.
No, the datasheet clearly says that STREAMSEL / DECODESEL is how you select the decoder while DTYPE indicates the S/PDIF audio format once decoding has started.
For example, my DVD player puts out STREAMSEL / DECODESEL = 3/3 every time I pause/stop the playback, but that doesn't mean there's PCM data in the stream.
Check using devices that transmit valid streams for the PLL to lock onto. I had a similar problem that was easily solved by using a better 3.3V supply.
But I also get the RST/LCK interrupt, which means there is a change of format, no? If says if you get RST/LCK, you need to soft reset the encoder. As soon as I do that with the 3/3, I get garbled audio.
The STA310.pdf says on RST: "The STA310 has detected a change in the incoming audio format. The soft Reset produce must be applied and the device must be re-initialized according to the new audio format detected. Registers DECODESEL (0x4d) and STREAMSEL (0x4c) contain the new audio format (1)". Which to me means in the interrupt I need to grab the DECODESEL and STREAMSEL registers, do a soft reset, then configure the encoder to 3/3, no? The documentation is confusing upon what you need to do here.
The STA310.pdf says on RST: "The STA310 has detected a change in the incoming audio format. The soft Reset produce must be applied and the device must be re-initialized according to the new audio format detected. Registers DECODESEL (0x4d) and STREAMSEL (0x4c) contain the new audio format (1)". Which to me means in the interrupt I need to grab the DECODESEL and STREAMSEL registers, do a soft reset, then configure the encoder to 3/3, no? The documentation is confusing upon what you need to do here.
Well, if you're so interested in debugging, you need to capture a reasonably long length of the S/PDIF bitstream, decode using bi-phase markcode and obtain the header information (read IEC61937-2 )to crosscheck/verify the same yourself. Altenatively, use a device that puts out a known bitstream, one that adheres to standards, for example a CD/DVD/BD player or computer.
Doesn't that mean that the new values for STREAMSEL and DECODESEL are automatically loaded for you into 0x4c and 0x4d by the autodetection algorithm ? I think that's fairly straightforward. If you've serviced the interrupt correctly, then check the bitstream by using a) another source b) another receiver.
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